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Bash Script Error Output To File

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If not, why? The position on the commandline does not really matter, a redirection (here document) is a redirection: # cat the two files plus "hello world" from standard input by here document redirection Reply Link Security: Are you a robot or human?Please enable JavaScript to submit this form.Cancel replyLeave a Comment Name Email Comment You can use these HTML tags and attributes: I don't know a global method (exec or thelike) off my head. navigate here

Consider it a simplified type of file pointer. Why did companions have such high social standing? The problem here is that, as we have seen, the redirections are setup before the command is actually executed. Tagged with: EasyNext FAQ: FreeBSD: (EE) Failed to load module "fbdev" (module does not exist, 0) Error and SolutionPrevious FAQ: FreeBSD 10: Apply Binary Updates To Keep Base System Up To

Redirect Output Error To File

filenames to redirect to) that contain spaces you must quote them! why? When in doubt, I use 2>/dev/null. Please explain the local library system in London, England Is the empty set homeomorphic to itself?

script.sh 2>output.txt …stderr is not connected to terminal now, how can the scrip get know abot it?? This is suitable sometimes for cron entries, if you want a command to pass in absolute silence.

 rm -f $(find / -name core) &> /dev/null 
This (thinking on the Reply Link Security: Are you a robot or human?Please enable JavaScript to submit this form.Cancel replyLeave a Comment Name Email Comment You can use these HTML tags and attributes: Shell Script Output File Jan Schampera, 2011/02/14 06:31 These are 2 cases.

So… I tried to redirect the stderror & stdout to /dev/null this way: rm * /directory1/directory2/ > 2&>1 /dev/null kept changing /dev/null form a special file & other users need crw-rw-rw- My approach is to always create a unique and timestamped log file. Basically you can: redirect stdout to a file redirect stderr to a file redirect stdout to a stderr redirect stderr to a stdout redirect stderr and stdout to a file redirect A.

A quick look at help read tells us that we can specify a file descriptor from which read should read. Batch Script Output File Input Redirection "n< file" When you run a commandusing command < file, it changes the file descriptor 0 so that it looks like: --- +-----------------------+ standard input ( 0 ) <----| Is it? –Salman Abbas Jul 11 '12 at 1:10 7 According to wiki.bash-hackers.org/scripting/obsolete, it seems to be obsolete in the sense that it is not part of POSIX, but the Reply Link Henry April 14, 2010, 4:53 pmhow does one redirect output from text file processing to a script file that uses the command line variable $1.file iplist has a long

Bash Script Output To File And Console

There are other problems as well. Privacy - Terms of Service - Questions or Comments ≡ MenuHomeAboutLinux Shell Scripting TutoriaLRSS/FeednixCraftLinux and Unix tutorials for new and seasoned sysadmin.BASH Shell Redirect Output and Errors To /dev/null by Vivek Redirect Output Error To File Another cool solution is about redirecting to both std-err/out AND to logger or log file at once which involves splitting "a stream" into two. Bash Script Output To File And Screen Reply Link Gopal May 24, 2015, 2:10 amuse tee -a to APPEND output using tee example : command | tee -a outfile.txt Reply Link Gopal May 24, 2015, 2:15 amBest way

Reply Link Jonathan May 26, 2009, 9:31 pmThanks! http://onlinetvsoftware.net/bash-script/bash-script-tar-error.php Reuti, 2011/09/21 08:05 I highly suggest to remove the paragraph with: alternative (by closing both filedescriptors): Command >&+2>&+ This is not working as one might expect: the error about not being We start as in the previous example, and Bash sees > file: --- +-----------------------+ standard input ( 0 ) ---->| /dev/pts/5 | --- +-----------------------+ --- +-----------------------+ standard output ( 1 ) The script does NOT run as root, which works because it removes the correct files but not the root-level stuff in directory2 (that I don't want to remove). Bash Script Input File

Join them; it only takes a minute: Sign up How to redirect both stdout and stderr to a file up vote 158 down vote favorite 44 Hi I am running a Browse other questions tagged command-line redirect or ask your own question. Jan Schampera, 2015/10/21 06:51 It's a functionality of the shell itself, the shell duplicates the relevant file descriptors when it sees those filenames. his comment is here Never use the Csh &>foo and >&foo shorthand redirects.

The command will then start with: --- +-----------------------+ standard input ( 0 ) ---->| /dev/pts/5 | --- +-----------------------+ --- +-----------------------+ standard output ( 1 ) ---->| /dev/pts/5 | --- +-----------------------+ --- Bash Script Redirect Stderr To Dev Null Reply Link Shane Hathaway February 24, 2012, 1:02 amSayed: that line means execute the command while redirecting both stdout and stderr to a file given by file-name. The other is to append.

with line feeds and empty lines.

It will open a new file descriptor pointing to file. First we type the command in our terminal, the descriptors look like this: --- +-----------------------+ standard input ( 0 ) ---->| /dev/pts/5 | --- +-----------------------+ --- +-----------------------+ standard output ( 1 I assume it has something to with file pointers. Bash Script Redirect Stderr To Variable Limit involving exponentials and arctangent without L'Hôpital Symbolic comparison of recursive functions A simple visual puzzle to die for Problem with using pause and onslide in one frame How does the

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Faria May 18 '15 at 13:38 @terdon how do I redirect output to a file which has no "w" permission for others , I meant to ask can I It is sometimes useful to assign one of these additional file descriptors to stdin, stdout, or stderr as a temporary duplicate link. [3] This simplifies restoration weblink It's probably better to do something like: exec 3>file ..... #commands that uses 3 .....

Can I log both the stderr and stdout logged to a file? Could you explain ? ((./cmd 2>&1 1>&3 | tee /tmp/stderr.log) 3>&1 1>&2) > /tmp/both.log 2>&1 Also, if I want to do the same in the script using exec to avoid this Reply Link Shyam November 18, 2015, 4:10 pmHi, Please tell me how to redirect the output from a script to a log file so that i can save all the details Follow him on Twitter.

The tag you use must be the only word in the line, to be recognized as end-of-here-document marker. You can also use 1 instead of 2 so that stdout gets redirected to the 'file' share|improve this answer answered Sep 24 '11 at 5:53 PaulDaviesC 512822 add a comment| Your It only happens on "preview", but it works for the real view. The "here document" will do what it's supposed to do, and the * will, too.

The purpose of all this becomes clear if we take only the commands: cmd2 --- +-------------+ -->( 0 ) ---->| 1st pipe | / --- +-------------+ / / --- +-------------+ cmd This functionality is provided by 'tee' command which can write/append to several file descriptors(files, sockets, pipes, etc) at once: tee FILE1 FILE2 ... >(cmd1) >(cmd2) ... Finally, for the left part of the pipe: --- +-------------+ ( 0 ) ---->| /dev/pts/5 | --- +-------------+ --- +-------------+ ( 1 ) ---->| 1st pipe | --- +-------------+ --- +-------------+ Reply Link Sekkuar September 2, 2013, 7:20 pmIncorrect.

Reply Link Martin June 2, 2014, 4:23 amYou could use find instead to filter out the files you don't want to delete, or only delete files matching a patter:Delete all files Note: The order matters as liw.fi pointed out, 2>&1 1>file.log doesn't work. When was this language released? bad_command2 2>>$ERRORFILE # Error message appended to $ERRORFILE.

more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation The result of running a script having the above line and additionally this one: echo "Will end up in STDOUT(terminal) and /var/log/messages" ...is as follows: $ ./my_script Will end up in share|improve this answer answered Apr 23 '13 at 5:07 einstein6 192 add a comment| up vote 1 down vote "Easiest" way (bash4 only): ls * 2>&- 1>&-. The Woz Monitor Dennis numbers 2.0 Finding a file starting with '-' dash What to tell to a rejected candidate?

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